2016-01-12. The 40,000-Mile Volcano.

posted Jan 12, 2016, 8:47 AM by Alan Gould
By William J. Broad, The New York Times. For GSS Energy Flow chapter 2. Excerpt: ...Recently, Dr. Tolstoy of Columbia University drew on such acoustic data from nine seabed eruptions over nearly two decades to paint a group portrait full of surprises. It turned out that all of those eruptions, from the Pacific, Atlantic and Arctic Oceans, took place from January to June. ...The cause, she proposed, is Earth’s slightly elliptical orbit around the sun. That changes the strength of the sun’s gravitational pull on Earth during the year and, as a result, the magnitude of the tides that squeeze the planet. She said the eruptions coincided with the annual letup of the squeeze. More boldly, Dr. Tolstoy suggested that such mechanisms might help explain how the planet’s regular ice ages end so abruptly — long a mystery. Ocean levels fall sharply in such bitterly cold periods as water is tied up in massive continental ice sheets. In a paper, she proposed that the reduced pressure on the ridges might let them erupt far more frequently. As a result, more carbon dioxide would spew into the ocean and, eventually, into the atmosphere, trapping more heat and warming the planet....  http://www.nytimes.com/2016/01/12/science/midocean-ridges-volcano-underwater.html
Comments